Re: [PATCH 1/5] x86, perf: Fix LBR call stack save/restore

[Andi Kleen]

> Any idea who much more expensive that wrmsr() is compared to the rdmsr()
> it replaces?

I don't know.
> 
> If its significant we could think about having this behaviour depend on
> callstacks.

This function is only used for callstacks, otherwise it uses the LBR reset
path.

-Andi


-- 
ak@xxxxxxxxxxxxxxx -- Speaking for myself only.
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